 | Euclides - 1884 - 182 pages
...angles thus formed cannot be both acute, nor can they be both obtuse. 49. PROPOSITION XIV. — THEOREM. If at a point in a straight line two other straight...one and the same straight line. At the point B in the straight line AB, let the straight lines BC, BD, upon opposite sides of AB, make the adjacent angles... | |
 | Stewart W. and co - 1884 - 272 pages
...CBE, EBD, are two right angles ; therefore DBA, ABC, are together equal to two right angles. XIV. — If, at a point in a straight line, two other straight...equal to two right angles, these two straight lines slinll be in one and the same straight line. At the point B in the straight line A AB, let the two... | |
 | Euclides - 1884 - 94 pages
...ARE NOW PUBLISHED IN A SIMILAR FORM TO THIS. PROPOSITION XIV. If at a point in a straight line, tivo other straight lines, upon the opposite sides of it,...adjacent angles together equal to two right angles ; then these two straight lines shall be in one and the same straight line. At the point in the straight... | |
 | Euclides - 1884 - 434 pages
...ways. If the exterior angles thus formed are equal, prove A ABC isosceles. PROPOSITION 14. THEOREM. If at a point in a straight line, two other straight lines on opposite sides of it make the adjacent angles together equal to two right angles, these two straight... | |
 | Euclides - 1884 - 214 pages
...Magnitudes which are equal to the same magnitude are equal to one another. PROPOSITION XIV. THEOREM. If, at a point in a straight line, two other straight lines, on the bpposite sides of it, make the adjacent angles together equal to two right angles; these two... | |
 | Education - 1884 - 708 pages
...equal sides be produced, the angles on the other side of the base shall be equal. Prop. 5, Bk. I. 2. If at a point in a straight line, two other straight lines, Ğl'on the opposite sides of it, make the adjacent angles together eqaal to two right angles ; then... | |
 | George William Usill - Surveying - 1889 - 306 pages
...two right angles. 5. If at a point in a straight line, AB, two other straight lines, c B and BD,upon the opposite sides of it, make the adjacent angles...equal to two right angles, these two straight lines, c B and BD, shall be in one and the same line. 6. If two straight lines cut one another, the vertically... | |
 | E. J. Brooksmith - Mathematics - 1889 - 354 pages
...l. Define a. right angle, and a. rhombus. If, at a point in a straight line, two straight lines on opposite sides of it make the adjacent angles together equal to two right angles, they are in the same straight line. A OB, COD are two intersecting straight lines, and each of the... | |
 | Edward Mann Langley, W. Seys Phillips - 1890 - 538 pages
...complementary to each Other; and each is called the complement of the other. PROPOSITION 14. THEOREM. If at a point in a straight line two other straight lines on opposite sides of it make adjacent angles together equal to two right angles, these two straight... | |
| |
If, at a point in a straight line, two other straight lines, upon the opposite sides of it, make the adjacent angles together equal to two right angles, these two straight lines shall be in one and the same straight line. 
